Geomagnetic polarity dating

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At any point and time, the Earth's magnetic field is characterized by a direction and intensity which can be measured.Often the parameters measured are the magnetic declination, D, the horizontal intensity, H, and the vertical intensity, Z.The Earth acts like a large spherical magnet: it is surrounded by a magnetic field that changes with time and location.The field is generated by a dipole magnet (i.e., a straight magnet with a north and south pole) located at the center of the Earth.

The Earth's magnetic field intensity is roughly between 25,000 - 65,000 n T (.25 - .65 gauss).Magnetic inclination is the angle between the horizontal plane and the total field vector, measured positive into Earth.In older literature, the term “magnetic elements” often referred to D, I, and H.These are declination (D), inclination (I), horizontal intensity (H), the north (X) and east (Y) components of the horizontal intensity, vertical intensity (Z), and total intensity (F).The parameters describing the direction of the magnetic field are declination (D) and inclination (I).

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